Antifrost glass device.



' L. W. MEULER. ANTIFROST GLASS DEVICE.

APPLICATION FILED DEO..23, 1913.

Patented Jan. 12 1915.

wNL J mlwwy witnesses attorneys ATENT OFFICE.

LOUIS W. MEULER, OF BURLINGTON, IOWA.

ANTIFROST GLASS DEVICE.

Application filed December 23, 1813'. Serial No.

To all whom it may concern:

Be it known that I, LOUIS W. MEULER, a citizen of the United States, residing at Burlington, in the county of Des Moines and State of Iowa, have invented certain new and useful Improvements in Antifrost Glass Devices, and I dohereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in window panes, and an object of the invention is to prevent the condensation of moisture on the pane, and thereby prevent the formation of frost which would make the glass less transparent.

A further object of the invention is to produce a hollow pane of glass containing a rarefied air chamber, whatever air there may be in the chamber'being dry so as to prevent condensation of water upon the interior Walls of the pane of glass.

A. further object of the invention is to provide a means for mounting the glass, said means conforming to the peculiar formation of the glass. I

With these and other objects in view, the invention consists in certain novel constructions, combinations and arrangements of parts as will be hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a perspective view of the pane of glass; Fig. 2 is a section through one corner of the pane of glass as seen in Fig. 1; Fig. 3 is a section taken through one edge of a modified form of the invention showing means for holding the pane of glass in a sash; Fig. 4 is a reduced sectional view through a pane of glass showing a still further modification; and Fig. 5 is a fragmentary view showing the edges of two distinct sheets of glass before the same are welded together, the same showing one method of forming thepane of glass described herein.

Similar reference characters designate corresponding parts throughout the several views. I

The general aim of the presentinvention is to provide a pane of glass having parallel sheets defining the space therebetween which is rarefied, or which contains "practically no moisture. Thereare several difierent forms of panes of glass which may be provided ac-- Specification of Letters Patent.

Patented Jan. 12, 1915.

cording to the present invention, and in order to set forth certain of these forms, reference is to he had to the accompanying drawings.

Referring to Figs. 1 and 2, it will be seen that the pane of glass comprises parallel spaced sheets 1 and 2, space located between the parallel sheets. The edges of the two sheets are connected by an edge wall 4 which is preferably formed integral 'with the sheets 1 and 2. This wall as shown in Fig. 2, constitutes a marginal flange of somewhat less width than the total width of the finished pane of glass, and may have inwardly extending therefrom the wall 5 converging toward the sheet 1 somewhat as at 6, and merging into a beveled shoulder 7, which in turn merges into the sheet 2. The-pane of glass is so formed that any'section along any edge will be substantially that represented by the showing given in Fig. 2. This form of the invention may be blown or may begformed otherwise, the method of production forming no particularpart of the present invention, but whatever the methods of making, it is desirable that theinterior space 3 be formed either as a vacuum, or if not a vacuum, made in such away that the air contained in the space 3 is dry and contains no moisture WhlCh upon cooling, would condense upon the exposed faces of the sheets 1 and 2.

By referring to Fig. 3, a modified form of the invention will be seen Where a sheet 8 comparable with sheet 1 is connected to a parallel sheet 9 spaced therefrom as in the case of the preferred form of the invention, but the two sheets 8 and 9 are connected by means of an edge wall 4' having a reduced extending solid flange 10. This flange 10 may be made either by blowing the pane of glass or by having two sheets of glass formed substantially as shown in Fig. 5 where the sheet 9 has an offset or beveled shoulder 11 which merges into the-flange 12 parallel to and adapted to rest against the edge of sheet 8. After the sheets have been assembled as "indicated in Fig. 5, heat may beapplied to the edges of the glass ad acent the flange 12, and the edges Welded or melted together, so as to become one piece. As in the preferred formof the invention the interior space 13 is to be either rarefied or to contain dry air.

In Fig. 3, the method of mounting the several types of panes in the sash, is indiwhich define the j subjected to strains and for an adequate mounting.

engineer.

cated. 'The 'jwindow casing is indicated generally at 14, and may receive in any apterior and also prevent forming my improved pane. By providing a vacuum betweenthese two sheets, I am enabled to prevent condensation on the inconduction of cold air from the outside to the inside which is in contact with the moist air.

. rubbet' beadbr washer 18 so formed as to fit into the rounded and beveled shoulder 19 between thesheet 9 and the flange 10. In order that the head 18 maybe held in place therei-s provided a. strip 20 secured in any What I claim is: r

1. A pane of glass comprising two spaced sheets, one of them plane to its periphery way to the sash 15, so as to fill out the rab bet As shown in thedrawings, the bottom of the flange 10 is spaced from the bottom of the rabbet 16 so that the full weight of the pane of glass comes fiipon the elastic bead 18. 7 It will be understoodthat this is a desirable construction when it is remembered that the space 13 may be rarefied, under which condition the pane of glass will be p this reason it is desirable to provide -When the strip 20 is forced iiito place and the bead 18 compressed, the solid flange 10 resists the pressure and the strain ofputting the pane into the sash. I

As shown in Fig. 4, when the pane is formed as just described in connection with Figs-3 and 5; there (may be located therein if desired; a number of spacing and reinforcing slugs 21 formed of any suitable material and held efither\- to both the sheets, or to one asth e case may be, these slugs 21 being provided in sufficient number to resist formingthe P31 6 0t glass when the space therebetweenisrarefied. 1 {The invention described herein is vdesigned to motives where ,there is considerable jarring, where there isalway's' present alcert'ain amount o f moisture in the atmosphere, and )where it is desirable tobe able to see clearly through the glass to It wil therefore beapparent it is highly de'sl from accumulating that upon the sheets of glass avoid mistakes by -theable to prevent moisture an integral and the other plane for a smaller area and having a surrounding beveled shoulder secured to the edge of the first-named sheet in anair' tight manner. I i

2. A pane of glass comprising two spaced sheets, one of them plane to its periphery and the other plane for a smaller area and merging at its edge into an internal inwardly beveled shoulder, the latter forming the pane. and merging integrally into the first-named sheet.

, 3. A pane of glass comprising two spaced sheets, one of them plane to its periphery and the other plane for a smaller area and merging at its edge into anintegral inwardly beveled shoulder, the latter merging into a wall diverging from the firstmamed sheet, and said wall merging into an edge wall which in turn merges integrally into the periphery of said first-named sheet.

-35 the pressureof the atmosphere on the sheets bev used "in the windows of 1000- a 4; In a window, the combination with a pane comprising two spaced sheets and a surroundin flange thinner than the pane,

flange around and thinner than flush onyone face with one of said sheets,

and having a shoulder merging into the other sheet; of a sash having a rabbet against one side wallof which the of. said flange rests, .a the shoulder and the other face of the 'flange, and a strip cllpsing the rabbet and bearing 'thebead'inwa d, as described. I

In testimony whereof I a'fiix my s1gna-:

turein presence of two witnesses.

LOUIS W. MEULER. Witnesses:

' .ADAM MEYE Ross FRENCH.

flush face bead resting against- 

